I really don't trust it

Diabetics can disregard this due to their need for it

But i DO NOT trust sweeteners... chemical substance for sugar

Why? 

Well yea sugar isnt the healthiest thing in the world and depending on the amount you eat it can lead to alot of nasty ale ments such as diabetes, obesity etc.
I like to think that because it it naturally grown on sugar cane (ignoring the processed thing) that it is much healthier fo ryou then sweeteners

Sweeteners "Artificial sweeteners are low-calorie or calorie-free chemical substances that are used instead of sugar to sweeten foods and drinks." As said on the NHS website... CHEMICAL to me says stuff like, pesticides, cleaning fluids, etc. And it even contains Aspartame (which is also another type of sweetner), which has had alot of questionable theorys in the past, several experiments were carried out and found it effected peoples health alot worse then normal sugar but alot of that was thrown away to keep the big drink companies going

I hoenstly dont trust diet drinks and low fat things all together, you have to wonder... what are they using to substitute all the stuff, natural or other wise, that they take out of the none diet products.

I'm not saying AT ALL that you need to believe exactly what i believe, most people trust sweeteners more... but for me.. its unnatural

Last reason i dont trust sweeteners is due to the fact there has been no long term study of people who have it regally
"However, research into sweeteners and appetite stimulation is inconsistent. Also, there is little evidence from longer-term studies to show that sweeteners lead to increased energy intake and contribute to the risk of obesity." <---From NHS website